Abstract

The addition of haptic feedback in digital musical instruments (DMIs) can improve performance control and expressivity. The TorqueTuner is a family of embedded rotary force-feedback modules that enable DMI designers to map haptic effects to musical parameters, facilitating straightforward haptic integration. In this demonstration, we present 3 TorqueTuner iterations based on different motors and drivers: 1) the newly redesigned Mechaduino (forked from an obsolete open-source servo platform by Tropical Labs), 2) the Mjbots Moteus (a high-power industrial motor), and the Makerfabs MaTouch SmartKnob (a self-contained device with a display). Attendees will interact with and compare each iteration, experiencing rotary haptic effects applied to a live musical context. Ultimately, we aim for this demonstration to lead to greater and easier integration of haptics into DMIs

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Abstract

Sensations build our experiences, and the sense of touch, a crucial component of engaging vir tual environments, remains underused. We examine the advantages of combining multiple types of actuators and applying this hybrid actuation concept to shape-changing displays to enhance their versatility.

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Abstract

Building multi-point haptic devices remains difficult because it requires expertise in programming, kinematics, hardware integration, and mechanical design. This creates a barrier for novice hapticians who want to prototype richer physical interactions but lack the multidisciplinary background needed to implement them. Existing frameworks such as CHAI3D provide strong runtime support for haptic rendering, but still require low-level C++ implementation. Existing authoring tools reduce programming effort for scene-level haptic content, but they generally assume the physical device already exists. This project explores a web-based authoring interface for modular multi-point haptic devices. The current prototype demonstrates a browser-based 3D environment for importing, arranging, inspecting, and viewing haptic components. While it is currently a visual proof of concept, it establishes the interface direction for future automated kinematics and CHAI3D-compatible code generation. This work introduces a web-based authoring workflow for modular multi-point haptic devices, moving early device design from low-level programming toward visual assembly and future automated kinematics.

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